High Efficiency Double Pulley (91%) Swinging-side plate parallel pulley, made of aluminum and polyamide, designed for single ropes that range from 8 to 11 mm in diameter. Compact, it is only 38mm long, 70mm tall, and 38mm wide, with a 2mm thick sign. With moving plates with approximate base that allows easy placement at any point of the rope and makes it difficult to drop the pulley when not attached to the carabiner. Designed for use in conjunction with the JAG TRAXION blocker pulley to make a 4:1 or 5:1 force demultiplication system. Pulleys mounted on sealed ball bearings for excellent efficiency. Weight: 120g Certifications: CE EN 12278, NFPA 1983 Technical Use and EAC Materials: aluminum and polyamide. Rope compatibility: 08-11mm Pulley type: sealed ball bearings Pulley diameter: 25 mm Maximum working load: 6 kN Breaking load: 22 kN Efficiency: 91% 3 year warranty. Allows use in temperatures between - 40°C and +80°C.